Simonet P
J Fr Ophtalmol. 1984;7(12):789-800.
A special device adapted to a Nikon projection vertexometer permits the power to be measured in the periphery of recent aspheric aphakic lenses. The peripheral power is measured with respect to the vertex sphere. A blended lenticular aspheric lens and three types of zonal aspheric full field lenses are studied, with various base curves on three samples. Four meridians of each lens are evaluated with ocular rotations varying by 5 degrees step up to 35 degrees at least. The results show a variable oblique astigmatism and a high under-correction of the mean oblique power for the Welsh 4 drop. The other zonal aspheric lenses give only a slight improvement of the peripheral powers compared with some conventional aspheric lenses. The Omega lens shows a reasonable correction of off-axis power errors up to 30 degrees. Beyond, the powers variation follows the general characteristics of blended lenticular aspheric lenses.
一种适配尼康投影式验光仪的特殊装置能够测量近期非球面无晶状体镜片周边的屈光力。周边屈光力是相对于顶点球面进行测量的。研究了一种融合双凸透镜状非球面镜片和三种类型的带状非球面全视野镜片，在三个样本上设置了不同的基弧。对每个镜片的四条子午线进行评估，眼睛旋转角度至少以5度为步长变化至35度。结果显示，对于威尔士4型滴剂存在可变的斜向散光以及平均斜向屈光力的高度欠矫正。与一些传统非球面镜片相比，其他带状非球面镜片仅使周边屈光力略有改善。欧米茄镜片在高达30度的离轴屈光力误差方面显示出合理的矫正效果。超过该角度后，屈光力变化遵循融合双凸透镜状非球面镜片的一般特征。
